Coats: Too quick on Miranda

4/28/13 9:19 AM EDT

“I was very surprised that they moved as quickly as they did,” the Indiana Republican said on CNN's "State of the Union." “We have legal reasons and follow-up investigate reasons to drag this out a little bit longer. We could have done that. I think the attorney general should have sent a signal basically saying, ‘We’re within our legal bounds in doing this with the public safety exemption, we need to get this information from the younger brother. He was wounded before and wasn’t able to communicate and we have very little time.'”

Coats said it will be hard to know if officials investigating the bombing lost out on any important information after a federal magistrate read Tsarnaev his Miranda rights.

“Now we won’t know because his lawyers won’t allow him to say anything," he said.